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111 lines
5.0 KiB
Python
111 lines
5.0 KiB
Python
# Copyright (C) 2013 Google Inc. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""Validate extended attributes.
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Design doc: http://www.chromium.org/developers/design-documents/idl-compiler#TOC-Extended-attribute-validation
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"""
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import os.path
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import re
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module_path = os.path.dirname(__file__)
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source_path = os.path.join(module_path, os.pardir, os.pardir)
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EXTENDED_ATTRIBUTES_RELATIVE_PATH = os.path.join('bindings',
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'IDLExtendedAttributes.txt')
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EXTENDED_ATTRIBUTES_FILENAME = os.path.join(source_path,
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EXTENDED_ATTRIBUTES_RELATIVE_PATH)
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class IDLInvalidExtendedAttributeError(Exception):
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pass
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class IDLExtendedAttributeValidator(object):
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def __init__(self):
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self.valid_extended_attributes = read_extended_attributes_file()
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def validate_extended_attributes(self, definitions):
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# FIXME: this should be done when parsing the file, rather than after.
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for interface in definitions.interfaces.itervalues():
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self.validate_extended_attributes_node(interface)
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for attribute in interface.attributes:
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self.validate_extended_attributes_node(attribute)
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for operation in interface.operations:
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self.validate_extended_attributes_node(operation)
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for argument in operation.arguments:
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self.validate_extended_attributes_node(argument)
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def validate_extended_attributes_node(self, node):
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for name, values_string in node.extended_attributes.iteritems():
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self.validate_name_values_string(name, values_string)
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def validate_name_values_string(self, name, values_string):
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if name not in self.valid_extended_attributes:
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raise IDLInvalidExtendedAttributeError(
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'Unknown extended attribute [%s]' % name)
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valid_values = self.valid_extended_attributes[name]
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if values_string is None and None not in valid_values:
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raise IDLInvalidExtendedAttributeError(
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'Missing required argument for extended attribute [%s]' % name)
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if '*' in valid_values: # wildcard, any (non-empty) value ok
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return
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if values_string is None:
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values = set([None])
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elif isinstance(values_string, list):
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values = set(values_string)
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else:
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values = set([values_string])
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invalid_values = values - valid_values
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if invalid_values:
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invalid_value = invalid_values.pop()
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raise IDLInvalidExtendedAttributeError(
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'Invalid value "%s" found in extended attribute [%s=%s]' %
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(invalid_value, name, values_string))
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def read_extended_attributes_file():
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def extended_attribute_name_values():
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with open(EXTENDED_ATTRIBUTES_FILENAME) as extended_attributes_file:
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for line in extended_attributes_file:
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line = line.strip()
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if not line or line.startswith('#'):
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continue
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name, _, values_string = map(str.strip, line.partition('='))
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value_list = [value.strip() for value in values_string.split('|')]
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yield name, value_list
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valid_extended_attributes = {}
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for name, value_list in extended_attribute_name_values():
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if not value_list:
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valid_extended_attributes[name] = set([None])
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continue
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valid_extended_attributes[name] = set([value if value else None
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for value in value_list])
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return valid_extended_attributes
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